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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.master.assignment;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.io.IOException;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.util.ArrayList;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.Arrays;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.Collection;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.Collections;</span> |
| <span class="source-line-no">025</span><span id="line-25">import java.util.List;</span> |
| <span class="source-line-no">026</span><span id="line-26">import java.util.stream.Stream;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.fs.FileSystem;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.fs.Path;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.MetaMutationAnnotation;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.ServerName;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.TableName;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.UnknownRegionException;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.client.ColumnFamilyDescriptor;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.client.DoNotRetryRegionException;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.client.MasterSwitchType;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.client.Mutation;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.client.RegionInfo;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.hbase.client.RegionInfoBuilder;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.hadoop.hbase.client.TableDescriptor;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.apache.hadoop.hbase.exceptions.MergeRegionException;</span> |
| <span class="source-line-no">042</span><span id="line-42">import org.apache.hadoop.hbase.io.hfile.CacheConfig;</span> |
| <span class="source-line-no">043</span><span id="line-43">import org.apache.hadoop.hbase.master.MasterCoprocessorHost;</span> |
| <span class="source-line-no">044</span><span id="line-44">import org.apache.hadoop.hbase.master.MasterFileSystem;</span> |
| <span class="source-line-no">045</span><span id="line-45">import org.apache.hadoop.hbase.master.RegionState;</span> |
| <span class="source-line-no">046</span><span id="line-46">import org.apache.hadoop.hbase.master.RegionState.State;</span> |
| <span class="source-line-no">047</span><span id="line-47">import org.apache.hadoop.hbase.master.normalizer.NormalizationPlan;</span> |
| <span class="source-line-no">048</span><span id="line-48">import org.apache.hadoop.hbase.master.procedure.AbstractStateMachineTableProcedure;</span> |
| <span class="source-line-no">049</span><span id="line-49">import org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv;</span> |
| <span class="source-line-no">050</span><span id="line-50">import org.apache.hadoop.hbase.master.procedure.MasterProcedureUtil;</span> |
| <span class="source-line-no">051</span><span id="line-51">import org.apache.hadoop.hbase.procedure2.ProcedureMetrics;</span> |
| <span class="source-line-no">052</span><span id="line-52">import org.apache.hadoop.hbase.procedure2.ProcedureStateSerializer;</span> |
| <span class="source-line-no">053</span><span id="line-53">import org.apache.hadoop.hbase.quotas.QuotaExceededException;</span> |
| <span class="source-line-no">054</span><span id="line-54">import org.apache.hadoop.hbase.regionserver.HRegionFileSystem;</span> |
| <span class="source-line-no">055</span><span id="line-55">import org.apache.hadoop.hbase.regionserver.HStoreFile;</span> |
| <span class="source-line-no">056</span><span id="line-56">import org.apache.hadoop.hbase.regionserver.StoreFileInfo;</span> |
| <span class="source-line-no">057</span><span id="line-57">import org.apache.hadoop.hbase.regionserver.StoreUtils;</span> |
| <span class="source-line-no">058</span><span id="line-58">import org.apache.hadoop.hbase.regionserver.storefiletracker.StoreFileTracker;</span> |
| <span class="source-line-no">059</span><span id="line-59">import org.apache.hadoop.hbase.regionserver.storefiletracker.StoreFileTrackerFactory;</span> |
| <span class="source-line-no">060</span><span id="line-60">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">061</span><span id="line-61">import org.apache.hadoop.hbase.util.CommonFSUtils;</span> |
| <span class="source-line-no">062</span><span id="line-62">import org.apache.hadoop.hbase.wal.WALSplitUtil;</span> |
| <span class="source-line-no">063</span><span id="line-63">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">064</span><span id="line-64">import org.slf4j.Logger;</span> |
| <span class="source-line-no">065</span><span id="line-65">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">066</span><span id="line-66"></span> |
| <span class="source-line-no">067</span><span id="line-67">import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;</span> |
| <span class="source-line-no">068</span><span id="line-68">import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetRegionInfoResponse;</span> |
| <span class="source-line-no">069</span><span id="line-69">import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos;</span> |
| <span class="source-line-no">070</span><span id="line-70">import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.MergeTableRegionsState;</span> |
| <span class="source-line-no">071</span><span id="line-71"></span> |
| <span class="source-line-no">072</span><span id="line-72">/**</span> |
| <span class="source-line-no">073</span><span id="line-73"> * The procedure to Merge regions in a table. This procedure takes an exclusive table lock since it</span> |
| <span class="source-line-no">074</span><span id="line-74"> * is working over multiple regions. It holds the lock for the life of the procedure. Throws</span> |
| <span class="source-line-no">075</span><span id="line-75"> * exception on construction if determines context hostile to merge (cluster going down or master is</span> |
| <span class="source-line-no">076</span><span id="line-76"> * shutting down or table is disabled).</span> |
| <span class="source-line-no">077</span><span id="line-77"> */</span> |
| <span class="source-line-no">078</span><span id="line-78">@InterfaceAudience.Private</span> |
| <span class="source-line-no">079</span><span id="line-79">public class MergeTableRegionsProcedure</span> |
| <span class="source-line-no">080</span><span id="line-80"> extends AbstractStateMachineTableProcedure<MergeTableRegionsState> {</span> |
| <span class="source-line-no">081</span><span id="line-81"> private static final Logger LOG = LoggerFactory.getLogger(MergeTableRegionsProcedure.class);</span> |
| <span class="source-line-no">082</span><span id="line-82"> private ServerName regionLocation;</span> |
| <span class="source-line-no">083</span><span id="line-83"></span> |
| <span class="source-line-no">084</span><span id="line-84"> /**</span> |
| <span class="source-line-no">085</span><span id="line-85"> * Two or more regions to merge, the 'merge parents'.</span> |
| <span class="source-line-no">086</span><span id="line-86"> */</span> |
| <span class="source-line-no">087</span><span id="line-87"> private RegionInfo[] regionsToMerge;</span> |
| <span class="source-line-no">088</span><span id="line-88"></span> |
| <span class="source-line-no">089</span><span id="line-89"> /**</span> |
| <span class="source-line-no">090</span><span id="line-90"> * The resulting merged region.</span> |
| <span class="source-line-no">091</span><span id="line-91"> */</span> |
| <span class="source-line-no">092</span><span id="line-92"> private RegionInfo mergedRegion;</span> |
| <span class="source-line-no">093</span><span id="line-93"></span> |
| <span class="source-line-no">094</span><span id="line-94"> private boolean force;</span> |
| <span class="source-line-no">095</span><span id="line-95"></span> |
| <span class="source-line-no">096</span><span id="line-96"> public MergeTableRegionsProcedure() {</span> |
| <span class="source-line-no">097</span><span id="line-97"> // Required by the Procedure framework to create the procedure on replay</span> |
| <span class="source-line-no">098</span><span id="line-98"> }</span> |
| <span class="source-line-no">099</span><span id="line-99"></span> |
| <span class="source-line-no">100</span><span id="line-100"> public MergeTableRegionsProcedure(final MasterProcedureEnv env, final RegionInfo[] regionsToMerge,</span> |
| <span class="source-line-no">101</span><span id="line-101"> final boolean force) throws IOException {</span> |
| <span class="source-line-no">102</span><span id="line-102"> super(env);</span> |
| <span class="source-line-no">103</span><span id="line-103"> // Check parent regions. Make sure valid before starting work.</span> |
| <span class="source-line-no">104</span><span id="line-104"> // This check calls the super method #checkOnline also.</span> |
| <span class="source-line-no">105</span><span id="line-105"> checkRegionsToMerge(env, regionsToMerge, force);</span> |
| <span class="source-line-no">106</span><span id="line-106"> // Sort the regions going into the merge.</span> |
| <span class="source-line-no">107</span><span id="line-107"> Arrays.sort(regionsToMerge);</span> |
| <span class="source-line-no">108</span><span id="line-108"> this.regionsToMerge = regionsToMerge;</span> |
| <span class="source-line-no">109</span><span id="line-109"> this.mergedRegion = createMergedRegionInfo(regionsToMerge);</span> |
| <span class="source-line-no">110</span><span id="line-110"> // Preflight depends on mergedRegion being set (at least).</span> |
| <span class="source-line-no">111</span><span id="line-111"> preflightChecks(env, true);</span> |
| <span class="source-line-no">112</span><span id="line-112"> this.force = force;</span> |
| <span class="source-line-no">113</span><span id="line-113"> }</span> |
| <span class="source-line-no">114</span><span id="line-114"></span> |
| <span class="source-line-no">115</span><span id="line-115"> /**</span> |
| <span class="source-line-no">116</span><span id="line-116"> * @throws MergeRegionException If unable to merge regions for whatever reasons.</span> |
| <span class="source-line-no">117</span><span id="line-117"> */</span> |
| <span class="source-line-no">118</span><span id="line-118"> private static void checkRegionsToMerge(MasterProcedureEnv env, final RegionInfo[] regions,</span> |
| <span class="source-line-no">119</span><span id="line-119"> final boolean force) throws MergeRegionException {</span> |
| <span class="source-line-no">120</span><span id="line-120"> long count = Arrays.stream(regions).distinct().count();</span> |
| <span class="source-line-no">121</span><span id="line-121"> if (regions.length != count) {</span> |
| <span class="source-line-no">122</span><span id="line-122"> throw new MergeRegionException("Duplicate regions specified; cannot merge a region to "</span> |
| <span class="source-line-no">123</span><span id="line-123"> + "itself. Passed in " + regions.length + " but only " + count + " unique.");</span> |
| <span class="source-line-no">124</span><span id="line-124"> }</span> |
| <span class="source-line-no">125</span><span id="line-125"> if (count < 2) {</span> |
| <span class="source-line-no">126</span><span id="line-126"> throw new MergeRegionException("Need two Regions at least to run a Merge");</span> |
| <span class="source-line-no">127</span><span id="line-127"> }</span> |
| <span class="source-line-no">128</span><span id="line-128"> RegionInfo previous = null;</span> |
| <span class="source-line-no">129</span><span id="line-129"> for (RegionInfo ri : regions) {</span> |
| <span class="source-line-no">130</span><span id="line-130"> if (previous != null) {</span> |
| <span class="source-line-no">131</span><span id="line-131"> if (!previous.getTable().equals(ri.getTable())) {</span> |
| <span class="source-line-no">132</span><span id="line-132"> String msg = "Can't merge regions from different tables: " + previous + ", " + ri;</span> |
| <span class="source-line-no">133</span><span id="line-133"> LOG.warn(msg);</span> |
| <span class="source-line-no">134</span><span id="line-134"> throw new MergeRegionException(msg);</span> |
| <span class="source-line-no">135</span><span id="line-135"> }</span> |
| <span class="source-line-no">136</span><span id="line-136"> if (!force && !ri.isAdjacent(previous) && !ri.isOverlap(previous)) {</span> |
| <span class="source-line-no">137</span><span id="line-137"> String msg = "Unable to merge non-adjacent or non-overlapping regions '"</span> |
| <span class="source-line-no">138</span><span id="line-138"> + previous.getShortNameToLog() + "', '" + ri.getShortNameToLog() + "' when force=false";</span> |
| <span class="source-line-no">139</span><span id="line-139"> LOG.warn(msg);</span> |
| <span class="source-line-no">140</span><span id="line-140"> throw new MergeRegionException(msg);</span> |
| <span class="source-line-no">141</span><span id="line-141"> }</span> |
| <span class="source-line-no">142</span><span id="line-142"> }</span> |
| <span class="source-line-no">143</span><span id="line-143"></span> |
| <span class="source-line-no">144</span><span id="line-144"> if (ri.getReplicaId() != RegionInfo.DEFAULT_REPLICA_ID) {</span> |
| <span class="source-line-no">145</span><span id="line-145"> throw new MergeRegionException("Can't merge non-default replicas; " + ri);</span> |
| <span class="source-line-no">146</span><span id="line-146"> }</span> |
| <span class="source-line-no">147</span><span id="line-147"> try {</span> |
| <span class="source-line-no">148</span><span id="line-148"> checkOnline(env, ri);</span> |
| <span class="source-line-no">149</span><span id="line-149"> } catch (DoNotRetryRegionException dnrre) {</span> |
| <span class="source-line-no">150</span><span id="line-150"> throw new MergeRegionException(dnrre);</span> |
| <span class="source-line-no">151</span><span id="line-151"> }</span> |
| <span class="source-line-no">152</span><span id="line-152"></span> |
| <span class="source-line-no">153</span><span id="line-153"> previous = ri;</span> |
| <span class="source-line-no">154</span><span id="line-154"> }</span> |
| <span class="source-line-no">155</span><span id="line-155"> }</span> |
| <span class="source-line-no">156</span><span id="line-156"></span> |
| <span class="source-line-no">157</span><span id="line-157"> /**</span> |
| <span class="source-line-no">158</span><span id="line-158"> * Create merged region info by looking at passed in <code>regionsToMerge</code> to figure what</span> |
| <span class="source-line-no">159</span><span id="line-159"> * extremes for start and end keys to use; merged region needs to have an extent sufficient to</span> |
| <span class="source-line-no">160</span><span id="line-160"> * cover all regions-to-merge.</span> |
| <span class="source-line-no">161</span><span id="line-161"> */</span> |
| <span class="source-line-no">162</span><span id="line-162"> private static RegionInfo createMergedRegionInfo(final RegionInfo[] regionsToMerge) {</span> |
| <span class="source-line-no">163</span><span id="line-163"> byte[] lowestStartKey = null;</span> |
| <span class="source-line-no">164</span><span id="line-164"> byte[] highestEndKey = null;</span> |
| <span class="source-line-no">165</span><span id="line-165"> // Region Id is a timestamp. Merged region's id can't be less than that of</span> |
| <span class="source-line-no">166</span><span id="line-166"> // merging regions else will insert at wrong location in hbase:meta (See HBASE-710).</span> |
| <span class="source-line-no">167</span><span id="line-167"> long highestRegionId = -1;</span> |
| <span class="source-line-no">168</span><span id="line-168"> for (RegionInfo ri : regionsToMerge) {</span> |
| <span class="source-line-no">169</span><span id="line-169"> if (lowestStartKey == null) {</span> |
| <span class="source-line-no">170</span><span id="line-170"> lowestStartKey = ri.getStartKey();</span> |
| <span class="source-line-no">171</span><span id="line-171"> } else if (Bytes.compareTo(ri.getStartKey(), lowestStartKey) < 0) {</span> |
| <span class="source-line-no">172</span><span id="line-172"> lowestStartKey = ri.getStartKey();</span> |
| <span class="source-line-no">173</span><span id="line-173"> }</span> |
| <span class="source-line-no">174</span><span id="line-174"> if (highestEndKey == null) {</span> |
| <span class="source-line-no">175</span><span id="line-175"> highestEndKey = ri.getEndKey();</span> |
| <span class="source-line-no">176</span><span id="line-176"> } else if (ri.isLast() || Bytes.compareTo(ri.getEndKey(), highestEndKey) > 0) {</span> |
| <span class="source-line-no">177</span><span id="line-177"> highestEndKey = ri.getEndKey();</span> |
| <span class="source-line-no">178</span><span id="line-178"> }</span> |
| <span class="source-line-no">179</span><span id="line-179"> highestRegionId = ri.getRegionId() > highestRegionId ? ri.getRegionId() : highestRegionId;</span> |
| <span class="source-line-no">180</span><span id="line-180"> }</span> |
| <span class="source-line-no">181</span><span id="line-181"> // Merged region is sorted between two merging regions in META</span> |
| <span class="source-line-no">182</span><span id="line-182"> return RegionInfoBuilder.newBuilder(regionsToMerge[0].getTable()).setStartKey(lowestStartKey)</span> |
| <span class="source-line-no">183</span><span id="line-183"> .setEndKey(highestEndKey).setSplit(false)</span> |
| <span class="source-line-no">184</span><span id="line-184"> .setRegionId(highestRegionId + 1/* Add one so new merged region is highest */).build();</span> |
| <span class="source-line-no">185</span><span id="line-185"> }</span> |
| <span class="source-line-no">186</span><span id="line-186"></span> |
| <span class="source-line-no">187</span><span id="line-187"> @Override</span> |
| <span class="source-line-no">188</span><span id="line-188"> protected Flow executeFromState(final MasterProcedureEnv env, MergeTableRegionsState state) {</span> |
| <span class="source-line-no">189</span><span id="line-189"> LOG.trace("{} execute state={}", this, state);</span> |
| <span class="source-line-no">190</span><span id="line-190"> try {</span> |
| <span class="source-line-no">191</span><span id="line-191"> switch (state) {</span> |
| <span class="source-line-no">192</span><span id="line-192"> case MERGE_TABLE_REGIONS_PREPARE:</span> |
| <span class="source-line-no">193</span><span id="line-193"> if (!prepareMergeRegion(env)) {</span> |
| <span class="source-line-no">194</span><span id="line-194"> assert isFailed() : "Merge region should have an exception here";</span> |
| <span class="source-line-no">195</span><span id="line-195"> return Flow.NO_MORE_STATE;</span> |
| <span class="source-line-no">196</span><span id="line-196"> }</span> |
| <span class="source-line-no">197</span><span id="line-197"> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_PRE_MERGE_OPERATION);</span> |
| <span class="source-line-no">198</span><span id="line-198"> break;</span> |
| <span class="source-line-no">199</span><span id="line-199"> case MERGE_TABLE_REGIONS_PRE_MERGE_OPERATION:</span> |
| <span class="source-line-no">200</span><span id="line-200"> preMergeRegions(env);</span> |
| <span class="source-line-no">201</span><span id="line-201"> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_CLOSE_REGIONS);</span> |
| <span class="source-line-no">202</span><span id="line-202"> break;</span> |
| <span class="source-line-no">203</span><span id="line-203"> case MERGE_TABLE_REGIONS_CLOSE_REGIONS:</span> |
| <span class="source-line-no">204</span><span id="line-204"> addChildProcedure(createUnassignProcedures(env));</span> |
| <span class="source-line-no">205</span><span id="line-205"> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_CHECK_CLOSED_REGIONS);</span> |
| <span class="source-line-no">206</span><span id="line-206"> break;</span> |
| <span class="source-line-no">207</span><span id="line-207"> case MERGE_TABLE_REGIONS_CHECK_CLOSED_REGIONS:</span> |
| <span class="source-line-no">208</span><span id="line-208"> checkClosedRegions(env);</span> |
| <span class="source-line-no">209</span><span id="line-209"> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_CREATE_MERGED_REGION);</span> |
| <span class="source-line-no">210</span><span id="line-210"> break;</span> |
| <span class="source-line-no">211</span><span id="line-211"> case MERGE_TABLE_REGIONS_CREATE_MERGED_REGION:</span> |
| <span class="source-line-no">212</span><span id="line-212"> removeNonDefaultReplicas(env);</span> |
| <span class="source-line-no">213</span><span id="line-213"> createMergedRegion(env);</span> |
| <span class="source-line-no">214</span><span id="line-214"> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_WRITE_MAX_SEQUENCE_ID_FILE);</span> |
| <span class="source-line-no">215</span><span id="line-215"> break;</span> |
| <span class="source-line-no">216</span><span id="line-216"> case MERGE_TABLE_REGIONS_WRITE_MAX_SEQUENCE_ID_FILE:</span> |
| <span class="source-line-no">217</span><span id="line-217"> writeMaxSequenceIdFile(env);</span> |
| <span class="source-line-no">218</span><span id="line-218"> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_PRE_MERGE_COMMIT_OPERATION);</span> |
| <span class="source-line-no">219</span><span id="line-219"> break;</span> |
| <span class="source-line-no">220</span><span id="line-220"> case MERGE_TABLE_REGIONS_PRE_MERGE_COMMIT_OPERATION:</span> |
| <span class="source-line-no">221</span><span id="line-221"> preMergeRegionsCommit(env);</span> |
| <span class="source-line-no">222</span><span id="line-222"> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_UPDATE_META);</span> |
| <span class="source-line-no">223</span><span id="line-223"> break;</span> |
| <span class="source-line-no">224</span><span id="line-224"> case MERGE_TABLE_REGIONS_UPDATE_META:</span> |
| <span class="source-line-no">225</span><span id="line-225"> updateMetaForMergedRegions(env);</span> |
| <span class="source-line-no">226</span><span id="line-226"> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_POST_MERGE_COMMIT_OPERATION);</span> |
| <span class="source-line-no">227</span><span id="line-227"> break;</span> |
| <span class="source-line-no">228</span><span id="line-228"> case MERGE_TABLE_REGIONS_POST_MERGE_COMMIT_OPERATION:</span> |
| <span class="source-line-no">229</span><span id="line-229"> postMergeRegionsCommit(env);</span> |
| <span class="source-line-no">230</span><span id="line-230"> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_OPEN_MERGED_REGION);</span> |
| <span class="source-line-no">231</span><span id="line-231"> break;</span> |
| <span class="source-line-no">232</span><span id="line-232"> case MERGE_TABLE_REGIONS_OPEN_MERGED_REGION:</span> |
| <span class="source-line-no">233</span><span id="line-233"> addChildProcedure(createAssignProcedures(env));</span> |
| <span class="source-line-no">234</span><span id="line-234"> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_POST_OPERATION);</span> |
| <span class="source-line-no">235</span><span id="line-235"> break;</span> |
| <span class="source-line-no">236</span><span id="line-236"> case MERGE_TABLE_REGIONS_POST_OPERATION:</span> |
| <span class="source-line-no">237</span><span id="line-237"> postCompletedMergeRegions(env);</span> |
| <span class="source-line-no">238</span><span id="line-238"> return Flow.NO_MORE_STATE;</span> |
| <span class="source-line-no">239</span><span id="line-239"> default:</span> |
| <span class="source-line-no">240</span><span id="line-240"> throw new UnsupportedOperationException(this + " unhandled state=" + state);</span> |
| <span class="source-line-no">241</span><span id="line-241"> }</span> |
| <span class="source-line-no">242</span><span id="line-242"> } catch (IOException e) {</span> |
| <span class="source-line-no">243</span><span id="line-243"> String msg = "Error trying to merge " + RegionInfo.getShortNameToLog(regionsToMerge) + " in "</span> |
| <span class="source-line-no">244</span><span id="line-244"> + getTableName() + " (in state=" + state + ")";</span> |
| <span class="source-line-no">245</span><span id="line-245"> if (!isRollbackSupported(state)) {</span> |
| <span class="source-line-no">246</span><span id="line-246"> // We reach a state that cannot be rolled back. We just need to keep retrying.</span> |
| <span class="source-line-no">247</span><span id="line-247"> LOG.warn(msg, e);</span> |
| <span class="source-line-no">248</span><span id="line-248"> } else {</span> |
| <span class="source-line-no">249</span><span id="line-249"> LOG.error(msg, e);</span> |
| <span class="source-line-no">250</span><span id="line-250"> setFailure("master-merge-regions", e);</span> |
| <span class="source-line-no">251</span><span id="line-251"> }</span> |
| <span class="source-line-no">252</span><span id="line-252"> }</span> |
| <span class="source-line-no">253</span><span id="line-253"> return Flow.HAS_MORE_STATE;</span> |
| <span class="source-line-no">254</span><span id="line-254"> }</span> |
| <span class="source-line-no">255</span><span id="line-255"></span> |
| <span class="source-line-no">256</span><span id="line-256"> /**</span> |
| <span class="source-line-no">257</span><span id="line-257"> * To rollback {@link MergeTableRegionsProcedure}, two AssignProcedures are asynchronously</span> |
| <span class="source-line-no">258</span><span id="line-258"> * submitted for each region to be merged (rollback doesn't wait on the completion of the</span> |
| <span class="source-line-no">259</span><span id="line-259"> * AssignProcedures) . This can be improved by changing rollback() to support sub-procedures. See</span> |
| <span class="source-line-no">260</span><span id="line-260"> * HBASE-19851 for details.</span> |
| <span class="source-line-no">261</span><span id="line-261"> */</span> |
| <span class="source-line-no">262</span><span id="line-262"> @Override</span> |
| <span class="source-line-no">263</span><span id="line-263"> protected void rollbackState(final MasterProcedureEnv env, final MergeTableRegionsState state)</span> |
| <span class="source-line-no">264</span><span id="line-264"> throws IOException {</span> |
| <span class="source-line-no">265</span><span id="line-265"> LOG.trace("{} rollback state={}", this, state);</span> |
| <span class="source-line-no">266</span><span id="line-266"></span> |
| <span class="source-line-no">267</span><span id="line-267"> try {</span> |
| <span class="source-line-no">268</span><span id="line-268"> switch (state) {</span> |
| <span class="source-line-no">269</span><span id="line-269"> case MERGE_TABLE_REGIONS_POST_OPERATION:</span> |
| <span class="source-line-no">270</span><span id="line-270"> case MERGE_TABLE_REGIONS_OPEN_MERGED_REGION:</span> |
| <span class="source-line-no">271</span><span id="line-271"> case MERGE_TABLE_REGIONS_POST_MERGE_COMMIT_OPERATION:</span> |
| <span class="source-line-no">272</span><span id="line-272"> case MERGE_TABLE_REGIONS_UPDATE_META:</span> |
| <span class="source-line-no">273</span><span id="line-273"> String msg = this + " We are in the " + state + " state."</span> |
| <span class="source-line-no">274</span><span id="line-274"> + " It is complicated to rollback the merge operation that region server is working on."</span> |
| <span class="source-line-no">275</span><span id="line-275"> + " Rollback is not supported and we should let the merge operation to complete";</span> |
| <span class="source-line-no">276</span><span id="line-276"> LOG.warn(msg);</span> |
| <span class="source-line-no">277</span><span id="line-277"> // PONR</span> |
| <span class="source-line-no">278</span><span id="line-278"> throw new UnsupportedOperationException(this + " unhandled state=" + state);</span> |
| <span class="source-line-no">279</span><span id="line-279"> case MERGE_TABLE_REGIONS_PRE_MERGE_COMMIT_OPERATION:</span> |
| <span class="source-line-no">280</span><span id="line-280"> break;</span> |
| <span class="source-line-no">281</span><span id="line-281"> case MERGE_TABLE_REGIONS_CREATE_MERGED_REGION:</span> |
| <span class="source-line-no">282</span><span id="line-282"> case MERGE_TABLE_REGIONS_WRITE_MAX_SEQUENCE_ID_FILE:</span> |
| <span class="source-line-no">283</span><span id="line-283"> cleanupMergedRegion(env);</span> |
| <span class="source-line-no">284</span><span id="line-284"> break;</span> |
| <span class="source-line-no">285</span><span id="line-285"> case MERGE_TABLE_REGIONS_CHECK_CLOSED_REGIONS:</span> |
| <span class="source-line-no">286</span><span id="line-286"> break;</span> |
| <span class="source-line-no">287</span><span id="line-287"> case MERGE_TABLE_REGIONS_CLOSE_REGIONS:</span> |
| <span class="source-line-no">288</span><span id="line-288"> rollbackCloseRegionsForMerge(env);</span> |
| <span class="source-line-no">289</span><span id="line-289"> break;</span> |
| <span class="source-line-no">290</span><span id="line-290"> case MERGE_TABLE_REGIONS_PRE_MERGE_OPERATION:</span> |
| <span class="source-line-no">291</span><span id="line-291"> postRollBackMergeRegions(env);</span> |
| <span class="source-line-no">292</span><span id="line-292"> break;</span> |
| <span class="source-line-no">293</span><span id="line-293"> case MERGE_TABLE_REGIONS_PREPARE:</span> |
| <span class="source-line-no">294</span><span id="line-294"> rollbackPrepareMerge(env);</span> |
| <span class="source-line-no">295</span><span id="line-295"> break;</span> |
| <span class="source-line-no">296</span><span id="line-296"> default:</span> |
| <span class="source-line-no">297</span><span id="line-297"> throw new UnsupportedOperationException(this + " unhandled state=" + state);</span> |
| <span class="source-line-no">298</span><span id="line-298"> }</span> |
| <span class="source-line-no">299</span><span id="line-299"> } catch (Exception e) {</span> |
| <span class="source-line-no">300</span><span id="line-300"> // This will be retried. Unless there is a bug in the code,</span> |
| <span class="source-line-no">301</span><span id="line-301"> // this should be just a "temporary error" (e.g. network down)</span> |
| <span class="source-line-no">302</span><span id="line-302"> LOG.warn("Failed rollback attempt step " + state + " for merging the regions "</span> |
| <span class="source-line-no">303</span><span id="line-303"> + RegionInfo.getShortNameToLog(regionsToMerge) + " in table " + getTableName(), e);</span> |
| <span class="source-line-no">304</span><span id="line-304"> throw e;</span> |
| <span class="source-line-no">305</span><span id="line-305"> }</span> |
| <span class="source-line-no">306</span><span id="line-306"> }</span> |
| <span class="source-line-no">307</span><span id="line-307"></span> |
| <span class="source-line-no">308</span><span id="line-308"> /*</span> |
| <span class="source-line-no">309</span><span id="line-309"> * Check whether we are in the state that can be rolled back</span> |
| <span class="source-line-no">310</span><span id="line-310"> */</span> |
| <span class="source-line-no">311</span><span id="line-311"> @Override</span> |
| <span class="source-line-no">312</span><span id="line-312"> protected boolean isRollbackSupported(final MergeTableRegionsState state) {</span> |
| <span class="source-line-no">313</span><span id="line-313"> switch (state) {</span> |
| <span class="source-line-no">314</span><span id="line-314"> case MERGE_TABLE_REGIONS_POST_OPERATION:</span> |
| <span class="source-line-no">315</span><span id="line-315"> case MERGE_TABLE_REGIONS_OPEN_MERGED_REGION:</span> |
| <span class="source-line-no">316</span><span id="line-316"> case MERGE_TABLE_REGIONS_POST_MERGE_COMMIT_OPERATION:</span> |
| <span class="source-line-no">317</span><span id="line-317"> case MERGE_TABLE_REGIONS_UPDATE_META:</span> |
| <span class="source-line-no">318</span><span id="line-318"> // It is not safe to rollback in these states.</span> |
| <span class="source-line-no">319</span><span id="line-319"> return false;</span> |
| <span class="source-line-no">320</span><span id="line-320"> default:</span> |
| <span class="source-line-no">321</span><span id="line-321"> break;</span> |
| <span class="source-line-no">322</span><span id="line-322"> }</span> |
| <span class="source-line-no">323</span><span id="line-323"> return true;</span> |
| <span class="source-line-no">324</span><span id="line-324"> }</span> |
| <span class="source-line-no">325</span><span id="line-325"></span> |
| <span class="source-line-no">326</span><span id="line-326"> private void removeNonDefaultReplicas(MasterProcedureEnv env) throws IOException {</span> |
| <span class="source-line-no">327</span><span id="line-327"> AssignmentManagerUtil.removeNonDefaultReplicas(env, Stream.of(regionsToMerge),</span> |
| <span class="source-line-no">328</span><span id="line-328"> getRegionReplication(env));</span> |
| <span class="source-line-no">329</span><span id="line-329"> }</span> |
| <span class="source-line-no">330</span><span id="line-330"></span> |
| <span class="source-line-no">331</span><span id="line-331"> private void checkClosedRegions(MasterProcedureEnv env) throws IOException {</span> |
| <span class="source-line-no">332</span><span id="line-332"> // Theoretically this should not happen any more after we use TRSP, but anyway</span> |
| <span class="source-line-no">333</span><span id="line-333"> // let's add a check here</span> |
| <span class="source-line-no">334</span><span id="line-334"> for (RegionInfo region : regionsToMerge) {</span> |
| <span class="source-line-no">335</span><span id="line-335"> AssignmentManagerUtil.checkClosedRegion(env, region);</span> |
| <span class="source-line-no">336</span><span id="line-336"> }</span> |
| <span class="source-line-no">337</span><span id="line-337"> }</span> |
| <span class="source-line-no">338</span><span id="line-338"></span> |
| <span class="source-line-no">339</span><span id="line-339"> @Override</span> |
| <span class="source-line-no">340</span><span id="line-340"> protected MergeTableRegionsState getState(final int stateId) {</span> |
| <span class="source-line-no">341</span><span id="line-341"> return MergeTableRegionsState.forNumber(stateId);</span> |
| <span class="source-line-no">342</span><span id="line-342"> }</span> |
| <span class="source-line-no">343</span><span id="line-343"></span> |
| <span class="source-line-no">344</span><span id="line-344"> @Override</span> |
| <span class="source-line-no">345</span><span id="line-345"> protected int getStateId(final MergeTableRegionsState state) {</span> |
| <span class="source-line-no">346</span><span id="line-346"> return state.getNumber();</span> |
| <span class="source-line-no">347</span><span id="line-347"> }</span> |
| <span class="source-line-no">348</span><span id="line-348"></span> |
| <span class="source-line-no">349</span><span id="line-349"> @Override</span> |
| <span class="source-line-no">350</span><span id="line-350"> protected MergeTableRegionsState getInitialState() {</span> |
| <span class="source-line-no">351</span><span id="line-351"> return MergeTableRegionsState.MERGE_TABLE_REGIONS_PREPARE;</span> |
| <span class="source-line-no">352</span><span id="line-352"> }</span> |
| <span class="source-line-no">353</span><span id="line-353"></span> |
| <span class="source-line-no">354</span><span id="line-354"> @Override</span> |
| <span class="source-line-no">355</span><span id="line-355"> protected void serializeStateData(ProcedureStateSerializer serializer) throws IOException {</span> |
| <span class="source-line-no">356</span><span id="line-356"> super.serializeStateData(serializer);</span> |
| <span class="source-line-no">357</span><span id="line-357"></span> |
| <span class="source-line-no">358</span><span id="line-358"> final MasterProcedureProtos.MergeTableRegionsStateData.Builder mergeTableRegionsMsg =</span> |
| <span class="source-line-no">359</span><span id="line-359"> MasterProcedureProtos.MergeTableRegionsStateData.newBuilder()</span> |
| <span class="source-line-no">360</span><span id="line-360"> .setUserInfo(MasterProcedureUtil.toProtoUserInfo(getUser()))</span> |
| <span class="source-line-no">361</span><span id="line-361"> .setMergedRegionInfo(ProtobufUtil.toRegionInfo(mergedRegion)).setForcible(force);</span> |
| <span class="source-line-no">362</span><span id="line-362"> for (RegionInfo ri : regionsToMerge) {</span> |
| <span class="source-line-no">363</span><span id="line-363"> mergeTableRegionsMsg.addRegionInfo(ProtobufUtil.toRegionInfo(ri));</span> |
| <span class="source-line-no">364</span><span id="line-364"> }</span> |
| <span class="source-line-no">365</span><span id="line-365"> serializer.serialize(mergeTableRegionsMsg.build());</span> |
| <span class="source-line-no">366</span><span id="line-366"> }</span> |
| <span class="source-line-no">367</span><span id="line-367"></span> |
| <span class="source-line-no">368</span><span id="line-368"> @Override</span> |
| <span class="source-line-no">369</span><span id="line-369"> protected void deserializeStateData(ProcedureStateSerializer serializer) throws IOException {</span> |
| <span class="source-line-no">370</span><span id="line-370"> super.deserializeStateData(serializer);</span> |
| <span class="source-line-no">371</span><span id="line-371"></span> |
| <span class="source-line-no">372</span><span id="line-372"> final MasterProcedureProtos.MergeTableRegionsStateData mergeTableRegionsMsg =</span> |
| <span class="source-line-no">373</span><span id="line-373"> serializer.deserialize(MasterProcedureProtos.MergeTableRegionsStateData.class);</span> |
| <span class="source-line-no">374</span><span id="line-374"> setUser(MasterProcedureUtil.toUserInfo(mergeTableRegionsMsg.getUserInfo()));</span> |
| <span class="source-line-no">375</span><span id="line-375"></span> |
| <span class="source-line-no">376</span><span id="line-376"> assert (mergeTableRegionsMsg.getRegionInfoCount() == 2);</span> |
| <span class="source-line-no">377</span><span id="line-377"> regionsToMerge = new RegionInfo[mergeTableRegionsMsg.getRegionInfoCount()];</span> |
| <span class="source-line-no">378</span><span id="line-378"> for (int i = 0; i < regionsToMerge.length; i++) {</span> |
| <span class="source-line-no">379</span><span id="line-379"> regionsToMerge[i] = ProtobufUtil.toRegionInfo(mergeTableRegionsMsg.getRegionInfo(i));</span> |
| <span class="source-line-no">380</span><span id="line-380"> }</span> |
| <span class="source-line-no">381</span><span id="line-381"></span> |
| <span class="source-line-no">382</span><span id="line-382"> mergedRegion = ProtobufUtil.toRegionInfo(mergeTableRegionsMsg.getMergedRegionInfo());</span> |
| <span class="source-line-no">383</span><span id="line-383"> }</span> |
| <span class="source-line-no">384</span><span id="line-384"></span> |
| <span class="source-line-no">385</span><span id="line-385"> @Override</span> |
| <span class="source-line-no">386</span><span id="line-386"> public void toStringClassDetails(StringBuilder sb) {</span> |
| <span class="source-line-no">387</span><span id="line-387"> sb.append(getClass().getSimpleName());</span> |
| <span class="source-line-no">388</span><span id="line-388"> sb.append(" table=");</span> |
| <span class="source-line-no">389</span><span id="line-389"> sb.append(getTableName());</span> |
| <span class="source-line-no">390</span><span id="line-390"> sb.append(", regions=");</span> |
| <span class="source-line-no">391</span><span id="line-391"> sb.append(RegionInfo.getShortNameToLog(regionsToMerge));</span> |
| <span class="source-line-no">392</span><span id="line-392"> sb.append(", force=");</span> |
| <span class="source-line-no">393</span><span id="line-393"> sb.append(force);</span> |
| <span class="source-line-no">394</span><span id="line-394"> }</span> |
| <span class="source-line-no">395</span><span id="line-395"></span> |
| <span class="source-line-no">396</span><span id="line-396"> @Override</span> |
| <span class="source-line-no">397</span><span id="line-397"> protected LockState acquireLock(final MasterProcedureEnv env) {</span> |
| <span class="source-line-no">398</span><span id="line-398"> RegionInfo[] lockRegions = Arrays.copyOf(regionsToMerge, regionsToMerge.length + 1);</span> |
| <span class="source-line-no">399</span><span id="line-399"> lockRegions[lockRegions.length - 1] = mergedRegion;</span> |
| <span class="source-line-no">400</span><span id="line-400"></span> |
| <span class="source-line-no">401</span><span id="line-401"> if (env.getProcedureScheduler().waitRegions(this, getTableName(), lockRegions)) {</span> |
| <span class="source-line-no">402</span><span id="line-402"> try {</span> |
| <span class="source-line-no">403</span><span id="line-403"> LOG.debug(LockState.LOCK_EVENT_WAIT + " " + env.getProcedureScheduler().dumpLocks());</span> |
| <span class="source-line-no">404</span><span id="line-404"> } catch (IOException e) {</span> |
| <span class="source-line-no">405</span><span id="line-405"> // Ignore, just for logging</span> |
| <span class="source-line-no">406</span><span id="line-406"> }</span> |
| <span class="source-line-no">407</span><span id="line-407"> return LockState.LOCK_EVENT_WAIT;</span> |
| <span class="source-line-no">408</span><span id="line-408"> }</span> |
| <span class="source-line-no">409</span><span id="line-409"> return LockState.LOCK_ACQUIRED;</span> |
| <span class="source-line-no">410</span><span id="line-410"> }</span> |
| <span class="source-line-no">411</span><span id="line-411"></span> |
| <span class="source-line-no">412</span><span id="line-412"> @Override</span> |
| <span class="source-line-no">413</span><span id="line-413"> protected void releaseLock(final MasterProcedureEnv env) {</span> |
| <span class="source-line-no">414</span><span id="line-414"> RegionInfo[] lockRegions = Arrays.copyOf(regionsToMerge, regionsToMerge.length + 1);</span> |
| <span class="source-line-no">415</span><span id="line-415"> lockRegions[lockRegions.length - 1] = mergedRegion;</span> |
| <span class="source-line-no">416</span><span id="line-416"></span> |
| <span class="source-line-no">417</span><span id="line-417"> env.getProcedureScheduler().wakeRegions(this, getTableName(), lockRegions);</span> |
| <span class="source-line-no">418</span><span id="line-418"> }</span> |
| <span class="source-line-no">419</span><span id="line-419"></span> |
| <span class="source-line-no">420</span><span id="line-420"> @Override</span> |
| <span class="source-line-no">421</span><span id="line-421"> protected boolean holdLock(MasterProcedureEnv env) {</span> |
| <span class="source-line-no">422</span><span id="line-422"> return true;</span> |
| <span class="source-line-no">423</span><span id="line-423"> }</span> |
| <span class="source-line-no">424</span><span id="line-424"></span> |
| <span class="source-line-no">425</span><span id="line-425"> @Override</span> |
| <span class="source-line-no">426</span><span id="line-426"> public TableName getTableName() {</span> |
| <span class="source-line-no">427</span><span id="line-427"> return mergedRegion.getTable();</span> |
| <span class="source-line-no">428</span><span id="line-428"> }</span> |
| <span class="source-line-no">429</span><span id="line-429"></span> |
| <span class="source-line-no">430</span><span id="line-430"> @Override</span> |
| <span class="source-line-no">431</span><span id="line-431"> public TableOperationType getTableOperationType() {</span> |
| <span class="source-line-no">432</span><span id="line-432"> return TableOperationType.REGION_MERGE;</span> |
| <span class="source-line-no">433</span><span id="line-433"> }</span> |
| <span class="source-line-no">434</span><span id="line-434"></span> |
| <span class="source-line-no">435</span><span id="line-435"> @Override</span> |
| <span class="source-line-no">436</span><span id="line-436"> protected ProcedureMetrics getProcedureMetrics(MasterProcedureEnv env) {</span> |
| <span class="source-line-no">437</span><span id="line-437"> return env.getAssignmentManager().getAssignmentManagerMetrics().getMergeProcMetrics();</span> |
| <span class="source-line-no">438</span><span id="line-438"> }</span> |
| <span class="source-line-no">439</span><span id="line-439"></span> |
| <span class="source-line-no">440</span><span id="line-440"> /**</span> |
| <span class="source-line-no">441</span><span id="line-441"> * Prepare merge and do some check</span> |
| <span class="source-line-no">442</span><span id="line-442"> */</span> |
| <span class="source-line-no">443</span><span id="line-443"> private boolean prepareMergeRegion(final MasterProcedureEnv env) throws IOException {</span> |
| <span class="source-line-no">444</span><span id="line-444"> // Fail if we are taking snapshot for the given table</span> |
| <span class="source-line-no">445</span><span id="line-445"> TableName tn = regionsToMerge[0].getTable();</span> |
| <span class="source-line-no">446</span><span id="line-446"> final String regionNamesToLog = RegionInfo.getShortNameToLog(regionsToMerge);</span> |
| <span class="source-line-no">447</span><span id="line-447"> if (env.getMasterServices().getSnapshotManager().isTableTakingAnySnapshot(tn)) {</span> |
| <span class="source-line-no">448</span><span id="line-448"> throw new MergeRegionException(</span> |
| <span class="source-line-no">449</span><span id="line-449"> "Skip merging regions " + regionNamesToLog + ", because we are snapshotting " + tn);</span> |
| <span class="source-line-no">450</span><span id="line-450"> }</span> |
| <span class="source-line-no">451</span><span id="line-451"></span> |
| <span class="source-line-no">452</span><span id="line-452"> // Mostly the below two checks are not used because we already check the switches before</span> |
| <span class="source-line-no">453</span><span id="line-453"> // submitting the merge procedure. Just for safety, we are checking the switch again here.</span> |
| <span class="source-line-no">454</span><span id="line-454"> // Also, in case the switch was set to false after submission, this procedure can be rollbacked,</span> |
| <span class="source-line-no">455</span><span id="line-455"> // thanks to this double check!</span> |
| <span class="source-line-no">456</span><span id="line-456"> // case 1: check for cluster level switch</span> |
| <span class="source-line-no">457</span><span id="line-457"> if (!env.getMasterServices().isSplitOrMergeEnabled(MasterSwitchType.MERGE)) {</span> |
| <span class="source-line-no">458</span><span id="line-458"> LOG.warn("Merge switch is off! skip merge of " + regionNamesToLog);</span> |
| <span class="source-line-no">459</span><span id="line-459"> setFailure(getClass().getSimpleName(),</span> |
| <span class="source-line-no">460</span><span id="line-460"> new IOException("Merge of " + regionNamesToLog + " failed because merge switch is off"));</span> |
| <span class="source-line-no">461</span><span id="line-461"> return false;</span> |
| <span class="source-line-no">462</span><span id="line-462"> }</span> |
| <span class="source-line-no">463</span><span id="line-463"> // case 2: check for table level switch</span> |
| <span class="source-line-no">464</span><span id="line-464"> if (!env.getMasterServices().getTableDescriptors().get(getTableName()).isMergeEnabled()) {</span> |
| <span class="source-line-no">465</span><span id="line-465"> LOG.warn("Merge is disabled for the table! Skipping merge of {}", regionNamesToLog);</span> |
| <span class="source-line-no">466</span><span id="line-466"> setFailure(getClass().getSimpleName(), new IOException(</span> |
| <span class="source-line-no">467</span><span id="line-467"> "Merge of " + regionNamesToLog + " failed as region merge is disabled for the table"));</span> |
| <span class="source-line-no">468</span><span id="line-468"> return false;</span> |
| <span class="source-line-no">469</span><span id="line-469"> }</span> |
| <span class="source-line-no">470</span><span id="line-470"></span> |
| <span class="source-line-no">471</span><span id="line-471"> RegionStates regionStates = env.getAssignmentManager().getRegionStates();</span> |
| <span class="source-line-no">472</span><span id="line-472"> RegionStateStore regionStateStore = env.getAssignmentManager().getRegionStateStore();</span> |
| <span class="source-line-no">473</span><span id="line-473"> for (RegionInfo ri : this.regionsToMerge) {</span> |
| <span class="source-line-no">474</span><span id="line-474"> if (regionStateStore.hasMergeRegions(ri)) {</span> |
| <span class="source-line-no">475</span><span id="line-475"> String msg = "Skip merging " + regionNamesToLog + ", because a parent, "</span> |
| <span class="source-line-no">476</span><span id="line-476"> + RegionInfo.getShortNameToLog(ri) + ", has a merge qualifier "</span> |
| <span class="source-line-no">477</span><span id="line-477"> + "(if a 'merge column' in parent, it was recently merged but still has outstanding "</span> |
| <span class="source-line-no">478</span><span id="line-478"> + "references to its parents that must be cleared before it can participate in merge -- "</span> |
| <span class="source-line-no">479</span><span id="line-479"> + "major compact it to hurry clearing of its references)";</span> |
| <span class="source-line-no">480</span><span id="line-480"> LOG.warn(msg);</span> |
| <span class="source-line-no">481</span><span id="line-481"> throw new MergeRegionException(msg);</span> |
| <span class="source-line-no">482</span><span id="line-482"> }</span> |
| <span class="source-line-no">483</span><span id="line-483"> RegionState state = regionStates.getRegionState(ri.getEncodedName());</span> |
| <span class="source-line-no">484</span><span id="line-484"> if (state == null) {</span> |
| <span class="source-line-no">485</span><span id="line-485"> throw new UnknownRegionException(</span> |
| <span class="source-line-no">486</span><span id="line-486"> RegionInfo.getShortNameToLog(ri) + " UNKNOWN (Has it been garbage collected?)");</span> |
| <span class="source-line-no">487</span><span id="line-487"> }</span> |
| <span class="source-line-no">488</span><span id="line-488"> if (!state.isOpened()) {</span> |
| <span class="source-line-no">489</span><span id="line-489"> throw new MergeRegionException("Unable to merge regions that are NOT online: " + ri);</span> |
| <span class="source-line-no">490</span><span id="line-490"> }</span> |
| <span class="source-line-no">491</span><span id="line-491"> // Ask the remote regionserver if regions are mergeable. If we get an IOE, report it</span> |
| <span class="source-line-no">492</span><span id="line-492"> // along with the failure, so we can see why regions are not mergeable at this time.</span> |
| <span class="source-line-no">493</span><span id="line-493"> try {</span> |
| <span class="source-line-no">494</span><span id="line-494"> if (!isMergeable(env, state)) {</span> |
| <span class="source-line-no">495</span><span id="line-495"> setFailure(getClass().getSimpleName(),</span> |
| <span class="source-line-no">496</span><span id="line-496"> new MergeRegionException("Skip merging " + regionNamesToLog + ", because a parent, "</span> |
| <span class="source-line-no">497</span><span id="line-497"> + RegionInfo.getShortNameToLog(ri) + ", is not mergeable"));</span> |
| <span class="source-line-no">498</span><span id="line-498"> return false;</span> |
| <span class="source-line-no">499</span><span id="line-499"> }</span> |
| <span class="source-line-no">500</span><span id="line-500"> } catch (IOException e) {</span> |
| <span class="source-line-no">501</span><span id="line-501"> IOException ioe = new IOException(RegionInfo.getShortNameToLog(ri) + " NOT mergeable", e);</span> |
| <span class="source-line-no">502</span><span id="line-502"> setFailure(getClass().getSimpleName(), ioe);</span> |
| <span class="source-line-no">503</span><span id="line-503"> return false;</span> |
| <span class="source-line-no">504</span><span id="line-504"> }</span> |
| <span class="source-line-no">505</span><span id="line-505"> }</span> |
| <span class="source-line-no">506</span><span id="line-506"></span> |
| <span class="source-line-no">507</span><span id="line-507"> // Update region states to Merging</span> |
| <span class="source-line-no">508</span><span id="line-508"> setRegionStateToMerging(env);</span> |
| <span class="source-line-no">509</span><span id="line-509"> return true;</span> |
| <span class="source-line-no">510</span><span id="line-510"> }</span> |
| <span class="source-line-no">511</span><span id="line-511"></span> |
| <span class="source-line-no">512</span><span id="line-512"> private boolean isMergeable(final MasterProcedureEnv env, final RegionState rs)</span> |
| <span class="source-line-no">513</span><span id="line-513"> throws IOException {</span> |
| <span class="source-line-no">514</span><span id="line-514"> GetRegionInfoResponse response =</span> |
| <span class="source-line-no">515</span><span id="line-515"> AssignmentManagerUtil.getRegionInfoResponse(env, rs.getServerName(), rs.getRegion());</span> |
| <span class="source-line-no">516</span><span id="line-516"> return response.hasMergeable() && response.getMergeable();</span> |
| <span class="source-line-no">517</span><span id="line-517"> }</span> |
| <span class="source-line-no">518</span><span id="line-518"></span> |
| <span class="source-line-no">519</span><span id="line-519"> /**</span> |
| <span class="source-line-no">520</span><span id="line-520"> * Action for rollback a merge table after prepare merge</span> |
| <span class="source-line-no">521</span><span id="line-521"> */</span> |
| <span class="source-line-no">522</span><span id="line-522"> private void rollbackPrepareMerge(final MasterProcedureEnv env) throws IOException {</span> |
| <span class="source-line-no">523</span><span id="line-523"> for (RegionInfo rinfo : regionsToMerge) {</span> |
| <span class="source-line-no">524</span><span id="line-524"> RegionStateNode regionStateNode =</span> |
| <span class="source-line-no">525</span><span id="line-525"> env.getAssignmentManager().getRegionStates().getRegionStateNode(rinfo);</span> |
| <span class="source-line-no">526</span><span id="line-526"> if (regionStateNode.getState() == State.MERGING) {</span> |
| <span class="source-line-no">527</span><span id="line-527"> regionStateNode.setState(State.OPEN);</span> |
| <span class="source-line-no">528</span><span id="line-528"> }</span> |
| <span class="source-line-no">529</span><span id="line-529"> }</span> |
| <span class="source-line-no">530</span><span id="line-530"> }</span> |
| <span class="source-line-no">531</span><span id="line-531"></span> |
| <span class="source-line-no">532</span><span id="line-532"> /**</span> |
| <span class="source-line-no">533</span><span id="line-533"> * Pre merge region action</span> |
| <span class="source-line-no">534</span><span id="line-534"> * @param env MasterProcedureEnv</span> |
| <span class="source-line-no">535</span><span id="line-535"> **/</span> |
| <span class="source-line-no">536</span><span id="line-536"> private void preMergeRegions(final MasterProcedureEnv env) throws IOException {</span> |
| <span class="source-line-no">537</span><span id="line-537"> final MasterCoprocessorHost cpHost = env.getMasterCoprocessorHost();</span> |
| <span class="source-line-no">538</span><span id="line-538"> if (cpHost != null) {</span> |
| <span class="source-line-no">539</span><span id="line-539"> cpHost.preMergeRegionsAction(regionsToMerge, getUser());</span> |
| <span class="source-line-no">540</span><span id="line-540"> }</span> |
| <span class="source-line-no">541</span><span id="line-541"> // TODO: Clean up split and merge. Currently all over the place.</span> |
| <span class="source-line-no">542</span><span id="line-542"> try {</span> |
| <span class="source-line-no">543</span><span id="line-543"> env.getMasterServices().getMasterQuotaManager().onRegionMerged(this.mergedRegion);</span> |
| <span class="source-line-no">544</span><span id="line-544"> } catch (QuotaExceededException e) {</span> |
| <span class="source-line-no">545</span><span id="line-545"> // TODO: why is this here? merge requests can be submitted by actors other than the normalizer</span> |
| <span class="source-line-no">546</span><span id="line-546"> env.getMasterServices().getRegionNormalizerManager()</span> |
| <span class="source-line-no">547</span><span id="line-547"> .planSkipped(NormalizationPlan.PlanType.MERGE);</span> |
| <span class="source-line-no">548</span><span id="line-548"> throw e;</span> |
| <span class="source-line-no">549</span><span id="line-549"> }</span> |
| <span class="source-line-no">550</span><span id="line-550"> }</span> |
| <span class="source-line-no">551</span><span id="line-551"></span> |
| <span class="source-line-no">552</span><span id="line-552"> /**</span> |
| <span class="source-line-no">553</span><span id="line-553"> * Action after rollback a merge table regions action.</span> |
| <span class="source-line-no">554</span><span id="line-554"> */</span> |
| <span class="source-line-no">555</span><span id="line-555"> private void postRollBackMergeRegions(final MasterProcedureEnv env) throws IOException {</span> |
| <span class="source-line-no">556</span><span id="line-556"> final MasterCoprocessorHost cpHost = env.getMasterCoprocessorHost();</span> |
| <span class="source-line-no">557</span><span id="line-557"> if (cpHost != null) {</span> |
| <span class="source-line-no">558</span><span id="line-558"> cpHost.postRollBackMergeRegionsAction(regionsToMerge, getUser());</span> |
| <span class="source-line-no">559</span><span id="line-559"> }</span> |
| <span class="source-line-no">560</span><span id="line-560"> }</span> |
| <span class="source-line-no">561</span><span id="line-561"></span> |
| <span class="source-line-no">562</span><span id="line-562"> /**</span> |
| <span class="source-line-no">563</span><span id="line-563"> * Set the region states to MERGING state</span> |
| <span class="source-line-no">564</span><span id="line-564"> */</span> |
| <span class="source-line-no">565</span><span id="line-565"> private void setRegionStateToMerging(final MasterProcedureEnv env) {</span> |
| <span class="source-line-no">566</span><span id="line-566"> // Set State.MERGING to regions to be merged</span> |
| <span class="source-line-no">567</span><span id="line-567"> RegionStates regionStates = env.getAssignmentManager().getRegionStates();</span> |
| <span class="source-line-no">568</span><span id="line-568"> for (RegionInfo ri : this.regionsToMerge) {</span> |
| <span class="source-line-no">569</span><span id="line-569"> regionStates.getRegionStateNode(ri).setState(State.MERGING);</span> |
| <span class="source-line-no">570</span><span id="line-570"> }</span> |
| <span class="source-line-no">571</span><span id="line-571"> }</span> |
| <span class="source-line-no">572</span><span id="line-572"></span> |
| <span class="source-line-no">573</span><span id="line-573"> /**</span> |
| <span class="source-line-no">574</span><span id="line-574"> * Create merged region. The way the merge works is that we make a 'merges' temporary directory in</span> |
| <span class="source-line-no">575</span><span id="line-575"> * the FIRST parent region to merge (Do not change this without also changing the rollback where</span> |
| <span class="source-line-no">576</span><span id="line-576"> * we look in this FIRST region for the merge dir). We then collect here references to all the</span> |
| <span class="source-line-no">577</span><span id="line-577"> * store files in all the parent regions including those of the FIRST parent region into a</span> |
| <span class="source-line-no">578</span><span id="line-578"> * subdirectory, named for the resultant merged region. We then call commitMergeRegion. It finds</span> |
| <span class="source-line-no">579</span><span id="line-579"> * this subdirectory of storefile references and moves them under the new merge region (creating</span> |
| <span class="source-line-no">580</span><span id="line-580"> * the region layout as side effect). After assign of the new merge region, we will run a</span> |
| <span class="source-line-no">581</span><span id="line-581"> * compaction. This will undo the references but the reference files remain in place until the</span> |
| <span class="source-line-no">582</span><span id="line-582"> * archiver runs (which it does on a period as a chore in the RegionServer that hosts the merge</span> |
| <span class="source-line-no">583</span><span id="line-583"> * region -- see CompactedHFilesDischarger). Once the archiver has moved aside the no-longer used</span> |
| <span class="source-line-no">584</span><span id="line-584"> * references, the merge region no longer has references. The catalog janitor will notice when it</span> |
| <span class="source-line-no">585</span><span id="line-585"> * runs next and it will remove the old parent regions.</span> |
| <span class="source-line-no">586</span><span id="line-586"> */</span> |
| <span class="source-line-no">587</span><span id="line-587"> private void createMergedRegion(final MasterProcedureEnv env) throws IOException {</span> |
| <span class="source-line-no">588</span><span id="line-588"> final MasterFileSystem mfs = env.getMasterServices().getMasterFileSystem();</span> |
| <span class="source-line-no">589</span><span id="line-589"> final Path tableDir = CommonFSUtils.getTableDir(mfs.getRootDir(), regionsToMerge[0].getTable());</span> |
| <span class="source-line-no">590</span><span id="line-590"> final FileSystem fs = mfs.getFileSystem();</span> |
| <span class="source-line-no">591</span><span id="line-591"> List<Path> mergedFiles = new ArrayList<>();</span> |
| <span class="source-line-no">592</span><span id="line-592"> HRegionFileSystem mergeRegionFs = HRegionFileSystem</span> |
| <span class="source-line-no">593</span><span id="line-593"> .createRegionOnFileSystem(env.getMasterConfiguration(), fs, tableDir, mergedRegion);</span> |
| <span class="source-line-no">594</span><span id="line-594"></span> |
| <span class="source-line-no">595</span><span id="line-595"> for (RegionInfo ri : this.regionsToMerge) {</span> |
| <span class="source-line-no">596</span><span id="line-596"> HRegionFileSystem regionFs = HRegionFileSystem</span> |
| <span class="source-line-no">597</span><span id="line-597"> .openRegionFromFileSystem(env.getMasterConfiguration(), fs, tableDir, ri, false);</span> |
| <span class="source-line-no">598</span><span id="line-598"> mergedFiles.addAll(mergeStoreFiles(env, regionFs, mergeRegionFs, mergedRegion));</span> |
| <span class="source-line-no">599</span><span id="line-599"> }</span> |
| <span class="source-line-no">600</span><span id="line-600"> assert mergeRegionFs != null;</span> |
| <span class="source-line-no">601</span><span id="line-601"> mergeRegionFs.commitMergedRegion(mergedFiles, env);</span> |
| <span class="source-line-no">602</span><span id="line-602"></span> |
| <span class="source-line-no">603</span><span id="line-603"> // Prepare to create merged regions</span> |
| <span class="source-line-no">604</span><span id="line-604"> env.getAssignmentManager().getRegionStates().getOrCreateRegionStateNode(mergedRegion)</span> |
| <span class="source-line-no">605</span><span id="line-605"> .setState(State.MERGING_NEW);</span> |
| <span class="source-line-no">606</span><span id="line-606"> }</span> |
| <span class="source-line-no">607</span><span id="line-607"></span> |
| <span class="source-line-no">608</span><span id="line-608"> private List<Path> mergeStoreFiles(MasterProcedureEnv env, HRegionFileSystem regionFs,</span> |
| <span class="source-line-no">609</span><span id="line-609"> HRegionFileSystem mergeRegionFs, RegionInfo mergedRegion) throws IOException {</span> |
| <span class="source-line-no">610</span><span id="line-610"> final TableDescriptor htd =</span> |
| <span class="source-line-no">611</span><span id="line-611"> env.getMasterServices().getTableDescriptors().get(mergedRegion.getTable());</span> |
| <span class="source-line-no">612</span><span id="line-612"> List<Path> mergedFiles = new ArrayList<>();</span> |
| <span class="source-line-no">613</span><span id="line-613"> for (ColumnFamilyDescriptor hcd : htd.getColumnFamilies()) {</span> |
| <span class="source-line-no">614</span><span id="line-614"> String family = hcd.getNameAsString();</span> |
| <span class="source-line-no">615</span><span id="line-615"> StoreFileTracker tracker =</span> |
| <span class="source-line-no">616</span><span id="line-616"> StoreFileTrackerFactory.create(env.getMasterConfiguration(), htd, hcd, regionFs);</span> |
| <span class="source-line-no">617</span><span id="line-617"> final Collection<StoreFileInfo> storeFiles = tracker.load();</span> |
| <span class="source-line-no">618</span><span id="line-618"> if (storeFiles != null && storeFiles.size() > 0) {</span> |
| <span class="source-line-no">619</span><span id="line-619"> final Configuration storeConfiguration =</span> |
| <span class="source-line-no">620</span><span id="line-620"> StoreUtils.createStoreConfiguration(env.getMasterConfiguration(), htd, hcd);</span> |
| <span class="source-line-no">621</span><span id="line-621"> for (StoreFileInfo storeFileInfo : storeFiles) {</span> |
| <span class="source-line-no">622</span><span id="line-622"> // Create reference file(s) to parent region file here in mergedDir.</span> |
| <span class="source-line-no">623</span><span id="line-623"> // As this procedure is running on master, use CacheConfig.DISABLED means</span> |
| <span class="source-line-no">624</span><span id="line-624"> // don't cache any block.</span> |
| <span class="source-line-no">625</span><span id="line-625"> // We also need to pass through a suitable CompoundConfiguration as if this</span> |
| <span class="source-line-no">626</span><span id="line-626"> // is running in a regionserver's Store context, or we might not be able</span> |
| <span class="source-line-no">627</span><span id="line-627"> // to read the hfiles.</span> |
| <span class="source-line-no">628</span><span id="line-628"> storeFileInfo.setConf(storeConfiguration);</span> |
| <span class="source-line-no">629</span><span id="line-629"> Path refFile = mergeRegionFs.mergeStoreFile(regionFs.getRegionInfo(), family,</span> |
| <span class="source-line-no">630</span><span id="line-630"> new HStoreFile(storeFileInfo, hcd.getBloomFilterType(), CacheConfig.DISABLED));</span> |
| <span class="source-line-no">631</span><span id="line-631"> mergedFiles.add(refFile);</span> |
| <span class="source-line-no">632</span><span id="line-632"> }</span> |
| <span class="source-line-no">633</span><span id="line-633"> }</span> |
| <span class="source-line-no">634</span><span id="line-634"> }</span> |
| <span class="source-line-no">635</span><span id="line-635"> return mergedFiles;</span> |
| <span class="source-line-no">636</span><span id="line-636"> }</span> |
| <span class="source-line-no">637</span><span id="line-637"></span> |
| <span class="source-line-no">638</span><span id="line-638"> /**</span> |
| <span class="source-line-no">639</span><span id="line-639"> * Clean up a merged region on rollback after failure.</span> |
| <span class="source-line-no">640</span><span id="line-640"> */</span> |
| <span class="source-line-no">641</span><span id="line-641"> private void cleanupMergedRegion(final MasterProcedureEnv env) throws IOException {</span> |
| <span class="source-line-no">642</span><span id="line-642"> final MasterFileSystem mfs = env.getMasterServices().getMasterFileSystem();</span> |
| <span class="source-line-no">643</span><span id="line-643"> TableName tn = this.regionsToMerge[0].getTable();</span> |
| <span class="source-line-no">644</span><span id="line-644"> final Path tabledir = CommonFSUtils.getTableDir(mfs.getRootDir(), tn);</span> |
| <span class="source-line-no">645</span><span id="line-645"> final FileSystem fs = mfs.getFileSystem();</span> |
| <span class="source-line-no">646</span><span id="line-646"> // See createMergedRegion above where we specify the merge dir as being in the</span> |
| <span class="source-line-no">647</span><span id="line-647"> // FIRST merge parent region.</span> |
| <span class="source-line-no">648</span><span id="line-648"> HRegionFileSystem regionFs = HRegionFileSystem.openRegionFromFileSystem(</span> |
| <span class="source-line-no">649</span><span id="line-649"> env.getMasterConfiguration(), fs, tabledir, regionsToMerge[0], false);</span> |
| <span class="source-line-no">650</span><span id="line-650"> regionFs.cleanupMergedRegion(mergedRegion);</span> |
| <span class="source-line-no">651</span><span id="line-651"> }</span> |
| <span class="source-line-no">652</span><span id="line-652"></span> |
| <span class="source-line-no">653</span><span id="line-653"> /**</span> |
| <span class="source-line-no">654</span><span id="line-654"> * Rollback close regions</span> |
| <span class="source-line-no">655</span><span id="line-655"> **/</span> |
| <span class="source-line-no">656</span><span id="line-656"> private void rollbackCloseRegionsForMerge(MasterProcedureEnv env) throws IOException {</span> |
| <span class="source-line-no">657</span><span id="line-657"> // At this point we should check if region was actually closed. If it was not closed then we</span> |
| <span class="source-line-no">658</span><span id="line-658"> // don't need to repoen the region and we can just change the regionNode state to OPEN.</span> |
| <span class="source-line-no">659</span><span id="line-659"> // if it is alredy closed then we need to do a reopen of region</span> |
| <span class="source-line-no">660</span><span id="line-660"> List<RegionInfo> toAssign = new ArrayList<>();</span> |
| <span class="source-line-no">661</span><span id="line-661"> for (RegionInfo rinfo : regionsToMerge) {</span> |
| <span class="source-line-no">662</span><span id="line-662"> RegionStateNode regionStateNode =</span> |
| <span class="source-line-no">663</span><span id="line-663"> env.getAssignmentManager().getRegionStates().getRegionStateNode(rinfo);</span> |
| <span class="source-line-no">664</span><span id="line-664"> if (regionStateNode.getState() != State.MERGING) {</span> |
| <span class="source-line-no">665</span><span id="line-665"> // same as before HBASE-28405</span> |
| <span class="source-line-no">666</span><span id="line-666"> toAssign.add(rinfo);</span> |
| <span class="source-line-no">667</span><span id="line-667"> }</span> |
| <span class="source-line-no">668</span><span id="line-668"> }</span> |
| <span class="source-line-no">669</span><span id="line-669"> AssignmentManagerUtil.reopenRegionsForRollback(env, toAssign, getRegionReplication(env),</span> |
| <span class="source-line-no">670</span><span id="line-670"> getServerName(env));</span> |
| <span class="source-line-no">671</span><span id="line-671"> }</span> |
| <span class="source-line-no">672</span><span id="line-672"></span> |
| <span class="source-line-no">673</span><span id="line-673"> private TransitRegionStateProcedure[] createUnassignProcedures(MasterProcedureEnv env)</span> |
| <span class="source-line-no">674</span><span id="line-674"> throws IOException {</span> |
| <span class="source-line-no">675</span><span id="line-675"> return AssignmentManagerUtil.createUnassignProceduresForSplitOrMerge(env,</span> |
| <span class="source-line-no">676</span><span id="line-676"> Stream.of(regionsToMerge), getRegionReplication(env));</span> |
| <span class="source-line-no">677</span><span id="line-677"> }</span> |
| <span class="source-line-no">678</span><span id="line-678"></span> |
| <span class="source-line-no">679</span><span id="line-679"> private TransitRegionStateProcedure[] createAssignProcedures(MasterProcedureEnv env)</span> |
| <span class="source-line-no">680</span><span id="line-680"> throws IOException {</span> |
| <span class="source-line-no">681</span><span id="line-681"> return AssignmentManagerUtil.createAssignProceduresForOpeningNewRegions(env,</span> |
| <span class="source-line-no">682</span><span id="line-682"> Collections.singletonList(mergedRegion), getRegionReplication(env), getServerName(env));</span> |
| <span class="source-line-no">683</span><span id="line-683"> }</span> |
| <span class="source-line-no">684</span><span id="line-684"></span> |
| <span class="source-line-no">685</span><span id="line-685"> private int getRegionReplication(final MasterProcedureEnv env) throws IOException {</span> |
| <span class="source-line-no">686</span><span id="line-686"> return env.getMasterServices().getTableDescriptors().get(getTableName()).getRegionReplication();</span> |
| <span class="source-line-no">687</span><span id="line-687"> }</span> |
| <span class="source-line-no">688</span><span id="line-688"></span> |
| <span class="source-line-no">689</span><span id="line-689"> /**</span> |
| <span class="source-line-no">690</span><span id="line-690"> * Post merge region action</span> |
| <span class="source-line-no">691</span><span id="line-691"> * @param env MasterProcedureEnv</span> |
| <span class="source-line-no">692</span><span id="line-692"> **/</span> |
| <span class="source-line-no">693</span><span id="line-693"> private void preMergeRegionsCommit(final MasterProcedureEnv env) throws IOException {</span> |
| <span class="source-line-no">694</span><span id="line-694"> final MasterCoprocessorHost cpHost = env.getMasterCoprocessorHost();</span> |
| <span class="source-line-no">695</span><span id="line-695"> if (cpHost != null) {</span> |
| <span class="source-line-no">696</span><span id="line-696"> @MetaMutationAnnotation</span> |
| <span class="source-line-no">697</span><span id="line-697"> final List<Mutation> metaEntries = new ArrayList<>();</span> |
| <span class="source-line-no">698</span><span id="line-698"> cpHost.preMergeRegionsCommit(regionsToMerge, metaEntries, getUser());</span> |
| <span class="source-line-no">699</span><span id="line-699"> try {</span> |
| <span class="source-line-no">700</span><span id="line-700"> for (Mutation p : metaEntries) {</span> |
| <span class="source-line-no">701</span><span id="line-701"> RegionInfo.parseRegionName(p.getRow());</span> |
| <span class="source-line-no">702</span><span id="line-702"> }</span> |
| <span class="source-line-no">703</span><span id="line-703"> } catch (IOException e) {</span> |
| <span class="source-line-no">704</span><span id="line-704"> LOG.error("Row key of mutation from coprocessor is not parsable as region name. "</span> |
| <span class="source-line-no">705</span><span id="line-705"> + "Mutations from coprocessor should only be for hbase:meta table.", e);</span> |
| <span class="source-line-no">706</span><span id="line-706"> throw e;</span> |
| <span class="source-line-no">707</span><span id="line-707"> }</span> |
| <span class="source-line-no">708</span><span id="line-708"> }</span> |
| <span class="source-line-no">709</span><span id="line-709"> }</span> |
| <span class="source-line-no">710</span><span id="line-710"></span> |
| <span class="source-line-no">711</span><span id="line-711"> /**</span> |
| <span class="source-line-no">712</span><span id="line-712"> * Add merged region to META and delete original regions.</span> |
| <span class="source-line-no">713</span><span id="line-713"> */</span> |
| <span class="source-line-no">714</span><span id="line-714"> private void updateMetaForMergedRegions(final MasterProcedureEnv env) throws IOException {</span> |
| <span class="source-line-no">715</span><span id="line-715"> env.getAssignmentManager().markRegionAsMerged(mergedRegion, getServerName(env),</span> |
| <span class="source-line-no">716</span><span id="line-716"> this.regionsToMerge);</span> |
| <span class="source-line-no">717</span><span id="line-717"> }</span> |
| <span class="source-line-no">718</span><span id="line-718"></span> |
| <span class="source-line-no">719</span><span id="line-719"> /**</span> |
| <span class="source-line-no">720</span><span id="line-720"> * Post merge region action</span> |
| <span class="source-line-no">721</span><span id="line-721"> * @param env MasterProcedureEnv</span> |
| <span class="source-line-no">722</span><span id="line-722"> **/</span> |
| <span class="source-line-no">723</span><span id="line-723"> private void postMergeRegionsCommit(final MasterProcedureEnv env) throws IOException {</span> |
| <span class="source-line-no">724</span><span id="line-724"> final MasterCoprocessorHost cpHost = env.getMasterCoprocessorHost();</span> |
| <span class="source-line-no">725</span><span id="line-725"> if (cpHost != null) {</span> |
| <span class="source-line-no">726</span><span id="line-726"> cpHost.postMergeRegionsCommit(regionsToMerge, mergedRegion, getUser());</span> |
| <span class="source-line-no">727</span><span id="line-727"> }</span> |
| <span class="source-line-no">728</span><span id="line-728"> }</span> |
| <span class="source-line-no">729</span><span id="line-729"></span> |
| <span class="source-line-no">730</span><span id="line-730"> /**</span> |
| <span class="source-line-no">731</span><span id="line-731"> * Post merge region action</span> |
| <span class="source-line-no">732</span><span id="line-732"> * @param env MasterProcedureEnv</span> |
| <span class="source-line-no">733</span><span id="line-733"> **/</span> |
| <span class="source-line-no">734</span><span id="line-734"> private void postCompletedMergeRegions(final MasterProcedureEnv env) throws IOException {</span> |
| <span class="source-line-no">735</span><span id="line-735"> final MasterCoprocessorHost cpHost = env.getMasterCoprocessorHost();</span> |
| <span class="source-line-no">736</span><span id="line-736"> if (cpHost != null) {</span> |
| <span class="source-line-no">737</span><span id="line-737"> cpHost.postCompletedMergeRegionsAction(regionsToMerge, mergedRegion, getUser());</span> |
| <span class="source-line-no">738</span><span id="line-738"> }</span> |
| <span class="source-line-no">739</span><span id="line-739"> }</span> |
| <span class="source-line-no">740</span><span id="line-740"></span> |
| <span class="source-line-no">741</span><span id="line-741"> /**</span> |
| <span class="source-line-no">742</span><span id="line-742"> * The procedure could be restarted from a different machine. If the variable is null, we need to</span> |
| <span class="source-line-no">743</span><span id="line-743"> * retrieve it.</span> |
| <span class="source-line-no">744</span><span id="line-744"> * @param env MasterProcedureEnv</span> |
| <span class="source-line-no">745</span><span id="line-745"> */</span> |
| <span class="source-line-no">746</span><span id="line-746"> private ServerName getServerName(final MasterProcedureEnv env) {</span> |
| <span class="source-line-no">747</span><span id="line-747"> if (regionLocation == null) {</span> |
| <span class="source-line-no">748</span><span id="line-748"> regionLocation =</span> |
| <span class="source-line-no">749</span><span id="line-749"> env.getAssignmentManager().getRegionStates().getRegionServerOfRegion(regionsToMerge[0]);</span> |
| <span class="source-line-no">750</span><span id="line-750"> // May still be null here but return null and let caller deal.</span> |
| <span class="source-line-no">751</span><span id="line-751"> // Means we lost the in-memory-only location. We are in recovery</span> |
| <span class="source-line-no">752</span><span id="line-752"> // or so. The caller should be able to deal w/ a null ServerName.</span> |
| <span class="source-line-no">753</span><span id="line-753"> // Let them go to the Balancer to find one to use instead.</span> |
| <span class="source-line-no">754</span><span id="line-754"> }</span> |
| <span class="source-line-no">755</span><span id="line-755"> return regionLocation;</span> |
| <span class="source-line-no">756</span><span id="line-756"> }</span> |
| <span class="source-line-no">757</span><span id="line-757"></span> |
| <span class="source-line-no">758</span><span id="line-758"> private void writeMaxSequenceIdFile(MasterProcedureEnv env) throws IOException {</span> |
| <span class="source-line-no">759</span><span id="line-759"> MasterFileSystem fs = env.getMasterFileSystem();</span> |
| <span class="source-line-no">760</span><span id="line-760"> long maxSequenceId = -1L;</span> |
| <span class="source-line-no">761</span><span id="line-761"> for (RegionInfo region : regionsToMerge) {</span> |
| <span class="source-line-no">762</span><span id="line-762"> maxSequenceId =</span> |
| <span class="source-line-no">763</span><span id="line-763"> Math.max(maxSequenceId, WALSplitUtil.getMaxRegionSequenceId(env.getMasterConfiguration(),</span> |
| <span class="source-line-no">764</span><span id="line-764"> region, fs::getFileSystem, fs::getWALFileSystem));</span> |
| <span class="source-line-no">765</span><span id="line-765"> }</span> |
| <span class="source-line-no">766</span><span id="line-766"> if (maxSequenceId > 0) {</span> |
| <span class="source-line-no">767</span><span id="line-767"> WALSplitUtil.writeRegionSequenceIdFile(fs.getWALFileSystem(),</span> |
| <span class="source-line-no">768</span><span id="line-768"> getWALRegionDir(env, mergedRegion), maxSequenceId);</span> |
| <span class="source-line-no">769</span><span id="line-769"> }</span> |
| <span class="source-line-no">770</span><span id="line-770"> }</span> |
| <span class="source-line-no">771</span><span id="line-771"></span> |
| <span class="source-line-no">772</span><span id="line-772"> /** Returns The merged region. Maybe be null if called to early or we failed. */</span> |
| <span class="source-line-no">773</span><span id="line-773"> RegionInfo getMergedRegion() {</span> |
| <span class="source-line-no">774</span><span id="line-774"> return this.mergedRegion;</span> |
| <span class="source-line-no">775</span><span id="line-775"> }</span> |
| <span class="source-line-no">776</span><span id="line-776"></span> |
| <span class="source-line-no">777</span><span id="line-777"> @Override</span> |
| <span class="source-line-no">778</span><span id="line-778"> protected boolean abort(MasterProcedureEnv env) {</span> |
| <span class="source-line-no">779</span><span id="line-779"> // Abort means rollback. We can't rollback all steps. HBASE-18018 added abort to all</span> |
| <span class="source-line-no">780</span><span id="line-780"> // Procedures. Here is a Procedure that has a PONR and cannot be aborted once it enters this</span> |
| <span class="source-line-no">781</span><span id="line-781"> // range of steps; what do we do for these should an operator want to cancel them? HBASE-20022.</span> |
| <span class="source-line-no">782</span><span id="line-782"> return isRollbackSupported(getCurrentState()) && super.abort(env);</span> |
| <span class="source-line-no">783</span><span id="line-783"> }</span> |
| <span class="source-line-no">784</span><span id="line-784">}</span> |
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| </div> |
| </main> |
| </body> |
| </html> |
